AI Synthesis AI011 Analog VCO
Classic 3340-based analog oscillator with four simultaneous waveforms
8 HP Eurorack module
The AI011 Analog VCO is a robust and stable analog Eurorack oscillator built around the legendary CEM/Curtis 3340 IC, providing rich, classic analog tones. It outputs buffered Triangle, Square, and Ramp waveforms simultaneously, plus a dedicated triangle-to-sine wave shaper for a smooth sine output. Its stable pitch tracking and multiple waveform outputs make it a versatile voice core for leads, basses, drones, and complex modulation sources.
Features
- CEM/Curtis 3340 VCO IC for stable, warm analog oscillator core
- Four simultaneous waveform outputs: Triangle, Square, Ramp, and Sine
- Triangle-to-sine wave shaper circuit for smooth sine output
- Buffered waveform outputs
- Coarse and Fine Tune controls for precise pitch setting
- 1V/Oct CV input for standard keyboard and sequencer tracking
- FM input with dedicated FM Amount attenuator knob
- Pulse Width control with Pulse Width CV input for dynamic square wave shaping
- Hard Sync input for classic sync timbres
- Sine Shaper control for adjusting sine wave character
- Mode Select control
- Available as fully built, DIY kit, and PCB/Panel format
Controls & Jacks (16)
- Coarse Tune — Coarse frequency tuning control
- Fine Tune — Fine frequency tuning control
- Hard Sync Input — Pulse width modulation control for square wave
- Pulse Width — Frequency modulation input
- FM Amount — Frequency modulation amount/depth control
- V/Oct Input — Pitch control via V/Oct standard
- Pulse Width CV — Pulse width modulation CV input
- Triangle Output 1 — Buffered triangle wave output
- Sine Shaper — Buffered square wave output
- Hard Sync Input — Hard sync input for syncing to external oscillator
- Triangle Output 2 — Buffered ramp wave output
- Square Output — Sine wave output from triangle to sine shaper
- Ramp Output — Mode selection switch
- Mode Select — Mode selection switch
- FM Input — Frequency modulation input
- Sine Output — Sine wave output from triangle to sine shaper
How-To Guides
- Warm Analog Drone
- Punchy Analog Bass
- PWM String Pad
- Hard Sync Harmonic Sweep
- FM Bell and Clang
- Detuned Unison Lead
- Audio-Rate LFO Modulation Source
- Self-FM Growl Bass
Explore the interactive AI011 Analog VCO panel on BleepDex — tap any control to learn what it does.
